Year % of GDP 1998 17.94345306442244 1999 16.112876573026565 2000 17.984835837506957 2001 17.98026240848323 2002 15.443302041424529 2003 12.005902388243737 2004 11.878217783455272 2005 11.543636880507913 2006 13.778159300590897 2007 12.385238241091974 2008 9.517319615242206 2009 10.002518502871906 2010 14.813713379390277 2011 14.425464222529474 2012 12.221629503182902 2013 14.801601747360756 2014 14.992540416269229 2015 15.664376046659353 2016 19.410503638149347 2017 17.978858565838287 2018 16.320003178576396 2019 17.05140622346261 2020 13.617109011845855 2021 14.234240506879955 2022 18.67476343577495